diff --git a/core/isdn4k-utils/PKGBUILD b/core/isdn4k-utils/PKGBUILD
index 63592a8da..3afaf7414 100644
--- a/core/isdn4k-utils/PKGBUILD
+++ b/core/isdn4k-utils/PKGBUILD
@@ -9,7 +9,7 @@
 
 pkgname=isdn4k-utils
 pkgver=3.27
-pkgrel=2
+pkgrel=3
 pkgdesc="User space administration programs and tools for ISDN"
 arch=('i686' 'x86_64')
 url="http://www.isdn4linux.de/"
@@ -61,7 +61,7 @@ prepare() {
 
 build() {
   cd $srcdir/$pkgname
-  make
+  PERL_USE_UNSAFE_INC=1 make
 }
 
 package() {